I wont lie to you, it is pretty buggy. I first got trapped by the box at the first box and then got stuck when my two boxes fused together at the end of the level. But the good news is you've only got the bones of a fun platformer.
I really like the mechanic of picking up knives to throw at enemies, I did double back to carry a knife from a previous room into the new one just "in case"
The art is good, your title is fantastic and the music fits the theme. Great job!